Arriving at Radio 1 to appear in the Live Lounge, the former X Factor star jazzed up her day-to-day wardrobe with a few cool and quirky touches.
Switching up her usually sophisticated style, Ella opted for a more playful look for her radio appearance and we just love her slogan jumper, don't you?!
Telling fans she was "mermaid vibing" on Twitter, Ella's vibrant sweater had the word 'COOL' emblazoned across it, with each letter embroided with aqua-hued sequins and metallic shells.
Brightening up her nearly-all-black ensemble, Ella accessorised with pinstriped courts and an eccentric pair of tinted blue cat-eye shades.
Now they are what you call oversized!
The 19-year-old wore her honey-blonde locks in volumised curls, painting her pout with plenty of gloss to complete her look.
Ella joined Fearne Cotton - who is pregnant with her second child - in the Live Lounge studio.
Taking to the mic the starlet sang an acoustic rendition of James Bay's track 'Hold Back The River' and her brand new single 'Mirror Man'.
'Mirror Man' will be Ella's fourth single from her debut album Chapter One and is said to be about the "most self-centred guy" the singer has ever met. Oo-er!
Following her performance, Ella thanked Fearne for having her as guest.
She tweeted: "Thank you @Fearnecotton for having me in the studio this morning.. p.s. I hope I look as good as you when I'm pregnant one day!! E x."
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Watch Ella's video for 'Mirror Man' here: